Trussed scaling-ladder.



No.v 699,374.

Patented May 6, |902.Y G. A. EDMISON & A. H. MYERS.

TRussEn scALlNG LADDER.

ATToHA/Er W/TNESSES @7M/.2M 911; www" UNrrnD STATES PATENT OFFICE.

GEORGE A. EDMISON AND A. HARRY MYERS, OF SPOKANE, WASHINGTON. l

TRUSSED SCALING-LADDER.l

SPECIFICATION forming part of Letters Patent N o. 699,374, dated May 6, 1902.

Application filed October 21. 1901. Serial No. 79,324. (Novmodel.)

To @ZZ whom t may concern:

Be it known that we, GEORGE A. EDMIsoN and A. HARRY MYERS, citizens of the United States, residing at Spokane, in the county of Spokane and State of lVashington, have invented certain new and useful Improvements in Trussed Scaling-Ladders; and we do hereby declare the following tofbe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of our invention is to provide a strong, safe, and'light ladder for life-saving purposes.

The remarkable strength which this ladder has we accomplish by the use of the double laddershaft, trussed, made of wood, each supported on the outside by a continuous steel strip riveted to the wood, bot-h wood and steel mortised at the proper distances to receive the ladder-ronge, which provide for the reception of the climbers feet on either side of the double shaft, the rungs being turned upward at either end, preventing the feet from slippingr off, the said steel strips approaching each other as they near the ends of the ladder, the steel strips alone considerably thickened, extending beyond the wood at the upper end of the ladder, constituting the hook, which is also trussed over the arch as far out as the rest,where the two steel strips come together and are welded, and steel catches shrunk over it, calculated to hold the ladder in place when in use and to prevent the ladder from slipping.

The combination of the steel and wood double ladder-shaft constructed on the truss principle is what we regard as our invention, as above set forth.

The use of this ladder is the same as all others of the class of ladders known as pompier or scaling ladders, the ladder being raisedand the hook on the upper end being thrust through the window-pane, the hook catching over the window-sill and the ladder being held iii-n1 and in place by the said hook,

the catches on the steel strips, and the brick? rest on the outside.

XVe illustrate the' mechanism of the said ladder by the accompanying drawings, in which- Figure lis a perspective view of the entire ladder. Fig. 2 is a side view of the entire ladder. Fig. 3 is an enlarged View of the upper end of the ladder, showing where the wooden shafts leave oit and the trussed principle applies to the arch in the steel bands extending beyond, forming the hook and showing the steel bands and wooden shafts bound together by means of steel rivets, also showing the shoulder of the ladder-rangs between the ladder-shafts calculated to maintain the truss. Fig. 4 represents the side View of a portion of the ladder, showing the attachment of the brick-rest. Fig. 5 is aview of the brick-rest, showing it attached to the ladder-rung by means of steel rivets between the two ladder-shafts.

Similarletters referto similarparts throughout the several views.

In a detailed description of our invention a represents the wooden ladder-shaft, and b represents the steel bands reinforcing a, the two being riveted together.

crepresents the steel hands extending above the wooden laddershafts forming the arch which terminates in the hook m, while d represents the steel catches.

e represents steel rivets binding together the wooden ladder-shafts and steel bands, while f represents the rivets binding the wooden shafts and steel bands together.

g represents the ladder-rungs, and 7c the shoulder on the same, holding the ladderh shafts in position. y

h represents the brick-rest, and m the hook, which catches over the window-sill when in use.

Having thus described our invention, what we claim as new and useful,and ask for Letters Patent on, is

The combination of the double wooden ladder-shaft, trussed, each of the wooden ladder-shafts being supported on the outside by continuous steel strips, running the entire length of the ladder and extendingbeyond at the top of the ladder, terminating in a hook, the said wooden ladder-shafts and the said steel str-ips being mortised atintervais to re- In testimony whereof We have affixed our eeive( the ladder-rungs, the truss formed by signatures in presence of two witnesses.

the'ladder-shafts being sustained by shouiders on the ladder-mugs between the shafts,

5 the steel catches shrunk onto the hook at the top ot' the ladder and a ladder-rest', atmehed- Vitnesses: to the back of the ladder-rungs, substantnli y JACKSON A. PHILLIPS,

' as set forth. MATT F. RYAN. 

